Triple valve.



I R. E. SHERMAN. TRIPLE VALVE. APPLICATION FILED NOV- 8, 1915.

1,173,751 Patented Feb. 29,1916.

WITNESSES:

Kara/Wm fzjnwq A TTORA/EY I 165 lgVE/VTOR RAY E. SHERMAN, OF DETROIT, MICHIGAN.

TRIPLE VALVE.

Specification of Letters Eatent.

Patented Feb.2,i91fi.

Application filed November 8, 1915. Serial No. 60,243.

To all whom it may concern ing drawings and more particularly pointed out in the following specification and claims.

It is well known among railroad officials that great loss and inconvenience is frequently incurred by their companies due to the unlawful removal of the triple slide valve from its casing by maliciously inclined persons, who remove the part to sell the same for old brass. As ordinarily constructed, by removing the cover plate of the valve casing-usually held in place by two or three bolts,the valve and other brass parts may be quickly and readily removed, and upon replacing the plate, it would be impossible to discover the loss until the car is put to service, as the removal of the parts would not be apparent from the outside, when the cover plate is in position.

The object, therefore, of this invention, is to provide an attachment connected with the slide valve, whereby the latter cannot be I unlawfully removed.

Other advantages and improvements will hereafter appear.

In the drawings accompanying this specification: Figure 1 is an end elevation of a triple valve showing the retaining device in position. Fig. 2 is a side elevation of a triple valve with parts in section showing the retaining device connected with the slide valve. Fig. 3 is a perspective view of the retaining device.

Referring now to the letters of reference placed upon the drawings: A, denotes the casing of a triple valve, B, indicates the slide valve (shown diagrammatically in section) in Fig. 2 of the drawings.

C, is the cover plate secured to the valve casing by bolts D, upon removing which, the slide valve B, as ordinarily arranged, may be easily and readily withdrawn.

E, denotes a retaining device, which in the embodiment shown, consists of a T-shaped member with its stem screwed into the end of the slide valve, or the stem of the piston B, on which the slide valve is mounted; the projecting ends E, E, of the member overlapping the wall of the valve casing. It will be obvious that while the valve is free to reciprocate within the valve chamber, the valve cannot be withdrawn upon removing the cover plate C, and can be removed only by disengaging the valve casing from the wall of the brake cylinder and other connecting parts (not shown), which would involve too much time and efiort for the ma liciously inclined person to undertake.

While I have shown a T-shaped retaining member, I do notwish to limit myself to this speciii form of. device, as it is obvious that other forms of retaining means, con

nected directly with t e valve and adapted to engage the chamber to prevent the withdrawal of the valve may be employed without departing from the spirit of my invention.

Having thus described my invention, what I claim is 2-- 1. In combination with the casing of a triple valve, the valve. a T-shaped element secured to one end of the valve, the projecting arms of the element being adapted to engage the walls of the casing, whereby the valve may not be removed from one end of the valve casing.

2. In a device of the character described, a valve casing, a valve mechanism embodying a piston and a coacting slide valve, a retaining element consisting of a shank secured to the valve mechanism having a right angle portion integral with the shank adapted to overlap the wall of the casing to provide against unauthorized withdrawal of the valve mechanism from the casing.

In testimony whereof, I sign this specification in the presence of two witnesses.

RAY E. SHERMAN.

Witnesses:

S. E. THoMAs, J. L. DUFF.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. 0. 

